Update HueBridge.js

- Add `Restart` charcacteristic to bridge accessory to restart Hue bridge or deCONZ gateway, see #599.

lib/HueBridge.js

@@ -149,6 +149,7 @@ HueBridge.prototype.exposeBridge = function (obj) {
       this.config.nativeHomeKitSensors = false
       /* falls through */
     case 'BSB002': // Philips Hue v2 (square) bridge;
+      this.isHue = true
       this.manufacturer = 'Philips'
       this.idString = util.format(
         '%s: %s %s %s v%s, api v%s', this.name, this.manufacturer,
@@ -181,6 +182,7 @@ HueBridge.prototype.exposeBridge = function (obj) {
         }, 60000)
         return d.promise
       }
+      this.isDeconz = true
       this.manufacturer = 'dresden elektronik'
       this.type = 'gateway'
       this.version = obj.swversion
@@ -250,6 +252,11 @@ HueBridge.prototype.exposeBridge = function (obj) {
   this.service.getCharacteristic(my.Characteristics.TransitionTime)
     .updateValue(this.state.transitiontime)
     .on('set', this.setTransitionTime.bind(this))
+  if (this.isHue || this.isDeconz) {
+    this.service.getCharacteristic(my.Characteristics.Restart)
+      .updateValue(false)
+      .on('set', this.setRestart.bind(this))
+  }
   this.accessoryList.push(this)
   return deferred(true)
 }
@@ -980,6 +987,30 @@ HueBridge.prototype.setTransitionTime = function (transitiontime, callback) {
   return callback()
 }
 
+HueBridge.prototype.setRestart = function (restart, callback) {
+  if (!restart) {
+    return callback()
+  }
+  this.log.info('%s: restart', this.name)
+  let method = 'put'
+  let path = '/config'
+  let body = { reboot: true }
+  if (this.isDeconz) {
+    method = 'post'
+    path = '/config/restartapp'
+    body = undefined
+  }
+  this.request(method, path, body)
+    .then((obj) => {
+      setTimeout(() => {
+        this.service.setCharacteristic(my.Characteristics.Restart, false)
+      }, this.platform.config.resetTimeout)
+      return callback()
+    }).catch((err) => {
+      return callback(err)
+    })
+}
+
 HueBridge.prototype.identify = function (callback) {
   this.log.info('%s: identify', this.name)
   this.platform.identify()